Jumpdash Problem.

OK, so I implemented this crude jumpdash function based on the spindash.


The problem is that when I execute it, Sonic goes to the left and exceeds the camera, so he ends up warping to the end.



tst.b $21(a0); is sonic in air?
bne.w locret_134D2; if not, branch


move.b ($FFFFF603).w,d0; read controller


and.b #$70,d0 ; is A, B or C being pressed


move.b #2,$1C(a0); set animation to roll


move.w jdash_norm(pc,d0.w),$14(a0); get speed


jdash_norm:


dc.w $C00; 0


dc.w $880; 1


dc.w $900; 2


dc.w $980; 3


dc.w $A00; 4


dc.w $A80; 5


dc.w $B00; 6


dc.w $B80; 7


dc.w $C00; 8


GetInertia:


move.w $14(a0),d0; get inertia


subi.w #$800,d0; subtract $800


add.w d0,d0 ; double it


andi.w #$1F00,d0; mask it against $1F00


neg.w d0 ; negate it


addi.w #$2000,d0; add $2000


move.w d0,($FFFFEED0).w; move to $EED0


btst #0,$22(a0); is sonic facing right?


beq.s PlaySoundforJdash; if not, branch


neg.w $14(a0) ; negate inertia


PlaySoundforJdash:


bset #2,$22(a0); set unused (in s1) flag


move.w #$BC,d0 ; spin release sound


jsr (PlaySound_Special).l; play it!


StackPtr:


addq.l #4,sp ; increase stack ptr


cmpi.w #$60,($FFFFF73E).w


beq.s loc6_1AD8C


bcc.s loc6_1AD88


addq.w #4,($FFFFF73E).w


loc6_1AD88:


subq.w #2,($FFFFF73E).w


loc6_1AD8C:


bsr.w Sonic_LevelBound


bsr.w Sonic_AnglePos

 

This code 'throws' sonic, like he gets thrown in spindash. However I see no 'release' code, so the game continues throwing him until he reaches the end.


Edit; i'd like to see that actually, can you post up a rom with this code in?

 

Huge bump I know, but it'll probably solve the problem, if you still have it.


Assuming this is sonic 1:


go to Obj01_MdJump2, and add above "bsr.w Sonic_JumpHeight"




bsr.w Sonic_JumpDash


bsr.w Sonic_JumpDash1



Then find "; End of function Sonic_JumpHeight" and add below:




Sonic_JumpDash:


tst.w $12(a0) ; is Sonic moving upwards?


beq.s endofjumpdash ; if not, branch


cmpi.b #$13,$1C(a0) ; is sonic using "PUNCHAIR" animation?


beq.w endofjumpdash ; if yes, branch


cmpi.b #$0E,$1C(a0) ; is sonic using "JUMPDASH" animation?


beq.w endofjumpdash ; if yes, branch


cmpi.b #2,$1C(a0) ; is Sonic rolling/jumping?


move.b ($FFFFF605).w,d0


btst #2,($FFFFF602).w ; is left being pressed?


beq.s endofjumpdash; if not, branch


andi.b #$10,d0 ; is B button pressed?


beq.s endofjumpdash; if not, branch


move.w #$1200,($FFFFD014).w ; set Sonic's speed


sub.w #$700,$10(a0) ; move Sonic left


move.b #$0E,$1C(a0) ; use "bouncing" animation


endofjumpdash:


rts


Sonic_JumpDash1: ;Jumpdash while facing right.


tst.w $12(a0) ; is Sonic moving upwards?


beq.s endofjumpdash1 ; if not, branch


cmpi.b #$13,$1C(a0) ; is sonic using "PUNCHAIR" animation?


beq.w endofjumpdash1 ; if yes, branch


cmpi.b #$0E,$1C(a0) ; is sonic using "JUMPDASH" animation?


beq.w endofjumpdash ; if yes, branch


cmpi.b #2,$1C(a0) ; is Sonic rolling/jumping?


move.b ($FFFFF605).w,d0


btst #3,($FFFFF602).w ; is RIGHT being pressed?


beq.s endofjumpdash1; if not, branch


andi.b #$10,d0 ; is B button pressed?


beq.s endofjumpdash1; if not, branch


move.w #$1200,($FFFFD014).w ; set Sonic's speed


add.w #$700,$10(a0) ; move Sonic right


move.b #$0e,$1C(a0) ; use "bouncing" animation


endofjumpdash1:


rts

 

Doesn't work... I got and error:

 

It would help if you posted what lines the errors are reffering to. =P


Also, remember I use Snasm68k, but show me the lines, and I'll see what I can do.

 

I made a guide on how to fix the out of branch error. Click here!

 

it's work just add


bsr.w Sonic_JumpDash


bsr.w Sonic_JumpDash1


to : Obj01_MdJump and Obj01_MdJump2


ok

 

Time to 1-up PsychoSk8r's code.


Code can be improved.



Sonic_Jumpdash:; beginning of code

jd1:; this code checks for flags and the c button (flags checked: if sonic's on the ground, If Sonic's in rolling animation, and the double jump flag)


tst.b $21(a0) ; is doublejump Flag set?


bne endofsonicjumpdash ; if yes, branch (stops sonic from being able to jumpdash multiple times at once)


btst #1,$22(a0) ; check if Sonic is on the ground


beq endofsonicjumpdash ; if so, branch (Stops Sonic from jumpdashing if he is simply trying to jump)


cmpi.b #2,$1C(a0) ; is Sonic rolling/jumping?


btst #5,($FFFFF605).w ; is button C pressed?


beq jd2 ; branch to '+'


jmp dashpower_under ; jump to continue jumpdash


rts ; don't check '+'


jd2:; this code checks for the B button


btst #4,($FFFFF605).w ; is button B pressed?


beq endofsonicjumpdash ; return if nothing is pressed


jmp dashpower_under ; jump to continue jumpdash


rts ; don't check 'dashpower_under'


dashpower_under:; code for setting in water jumpdash speed


cmpi.w #$800,$14(a0) ; check Sonic's inertia (not moving)


btst #6,$22(a0) ; is Sonic underwater?


beq dashpower_outof ; if not, branch


move.w #$475,d0 ; Set dash power (In water speed)


btst #0,$22(a0) ; is the orientation left?


beq Jumpdash_Finish ; if facing right, do nothing


neg.w d0 ; otherwise, negate d0 to switch direction of dash


bra Jumpdash_Finish


dashpower_outof:; code for setting out of water jumpdash speed


move.w #$975,d0 ; Set dash power (Out of water speed)


btst #0,$22(a0) ; is the orientation left?


beq Jumpdash_Finish ; if facing right, do nothing


neg.w d0 ; otherwise, negate d0 to switch direction of dash


Jumpdash_Finish:; code for finishing move, actually sends sonic forward and sets double jump flag


move.b #0,$12(a0) ; clear vert (Y) velocity


move.w d0,$10(a0) ; move Sonic forward (X axis)


move.b #0,$12(a0) ; clear vert (Y) velocity


move.b #2,$1C(a0) ; use "rolling" animation


move.b #1,$21(a0) ; Set Double Jump Flag


move.b #$BC,d0 ; Set jumping Sound


jsr (PlaySound_Special).l ; play jumping sound!


endofsonicjumpdash:; ends the Jumpdash code


rts ; cancel Jumpdash


; end of sonicdoublejump



That's how it should handle.


Although my code uses the jump/roll animation, so you will have to clear the doublejump flag at Sonic_Resetonfloor


My version checks for an underwater flag, setting the dash speed lower if the player is. This is the version I wrote for SSD ages ago.


If anyone uses this, please give me credit.